<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
        content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Title</title>
</head>
<body>
<script>
  // constructor: 查看对象的构造函数

  // let arr = [];
  // console.log(arr.constructor == Array);

  // constructor 的指向问题

  function Aaa() {

  }

  // Aaa.prototype.name = "小明";
  // Aaa.prototype.age = 20;

  Aaa.prototype = {
    constructor: Aaa,
    name: "小明",
    age: 20
  };

  let a1 = new Aaa();

  console.log(a1.constructor);
</script>
</body>
</html>
